CMC Triggers Drop-In Trigger Group AR-15/LR-308 Single Stage 3.5 lb - Precision Upgrade

A CMC Triggers drop-in trigger group replaces your factory AR-15 or LR-308 with a match-grade single-stage trigger that shoots cleaner and breaks crisper without the guesswork of tuning multiple components. Designed by competition shooter Chip McCormick, this self-contained module installs in minutes and delivers a 3.5 lb pull weight that's already factory-optimized for take-up and over-travel. If you're tired of mushy, heavy factory triggers holding back your accuracy potential, this is the upgrade that separates match-grade performance from the box-store standard.

The engineering here runs deeper than a fancy name. A rigid steel housing keeps all internal components in tight alignment, and precision-ground sear and hammer surfaces create that crisp, clean release shooters chase without sacrificing reliability. Oversized center pins replace the factory pins to reduce friction and eliminate trigger wobble, while threaded sleeves on the hammer and trigger pivots run buttery smooth. Chicago-style screws lock the pins in place so there's no creep or drift even after a high-round-count range session.

You'll choose between a traditional curved trigger shoe or a skeletonized flat design—flat offers a different feel and gives your build a distinctive look if that matters to your aesthetic. Either way, you get a drop-in assembly that requires no fitting, no staking, no gunsmithing. Install it, function-test, and run it. This is the trigger upgrade that turns a good AR into one that genuinely wants to shoot small groups.

Key Features

• Self-contained drop-in module—no component fitting or adjustment required
• Factory-tuned 3.5 lb single-stage pull for clean, consistent breaks
• Precision-ground sear and hammer surfaces for crisp release
• Oversized center pins reduce friction and eliminate trigger wobble
• Threaded hammer and trigger pivot sleeves for ultra-smooth operation
• Chicago-style screws prevent pin walk and drift
• Choice of curved or skeletonized flat trigger shoe
• Compatible with AR-15 and LR-308 platforms
• Minimized take-up and over-travel from factory tuning

Specifications

Frequently Asked Questions

Will this trigger work on both my AR-15 and LR-308?

Yes. This CMC drop-in is compatible with both AR-15 and LR-308 platforms.

Do I need a gunsmith to install it?

No. This is a true drop-in trigger group. It requires no fitting, adjustment, or staking—just install it in your lower receiver and function-test.

What's the difference between the curved and flat trigger shoe options?

The curved shoe is the traditional AR trigger profile. The flat (skeletonized) shoe offers a different feel and gives your build a distinctive look. Both versions maintain the same 3.5 lb pull weight and performance.

How does this compare to a factory trigger?

Factory AR triggers are typically heavier and mushier. This CMC single-stage delivers a crisp, clean break at 3.5 lb with factory-tuned take-up and over-travel, plus precision-ground engagement surfaces and smooth pivot operation—significant upgrades for accuracy and shooting quality.